The Bolt,machine, cataloged under National Stock Number 5306-00-335-4289, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-335-4289 |
| Primary Part Number | 7403743 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Head Height | 0.190 INCHES NOMINAL IN |
| Fastener Length | 1.340 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 1 CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2 CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Thread Length | 0.460 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.074 INCHES MINIMUM AND 0.079 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | ASTM A322 ASSN STD ALL MATERIAL RESPONSES OR ASTM A331 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.810 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN |
| Width Between Flats | 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.260 INCHES NOMINAL FIRST HOLE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5306-00-335-4289 is a Bolt,machine, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-335-4289 has 2 manufacturer part numbers on file: 7403743 (U S Army Tank Automotive Command Amsta-Im-Mm), 401544 (Renk America Llc Div Renk America).
1 possible match (shared part number, not a government interchangeability claim): 2915-00-608-4108. Verify interchangeability with system specifications before substitution.
Key specifications for 7403743: Head Height: 0.190 INCHES NOMINAL IN; Fastener Length: 1.340 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 1 CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2 CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL; Thread Length: 0.460 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN. 19 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.